QA output created by 011
*** test btrfs replace
ERROR: unable to open /dev/mapper/vg0-lv7: Device or resource busy
btrfs replace status (canceled) failed
failed: '/usr/local/bin/btrfs scrub start -B /mnt/scratch'
(see /xfstests-dev/results//btrfs_normal_freespacetree/btrfs/011.full for details)